11sync.net: bring back on fra1-a for now

hosts/fra1-a/configuration.nix

@@ -1,5 +1,7 @@
 {
+  lib,
   config,
+  pkgs,
   myData,
   modulesPath,
   ...
@@ -117,6 +119,30 @@
   };
 
   services = {
+    caddy = {
+      enable = true;
+      email = "motiejus+acme@jakstys.lt";
+      globalConfig = ''
+        servers {
+          metrics
+        }
+      '';
+      virtualHosts = {
+        "www.11sync.net".extraConfig = ''
+          redir https://jakstys.lt/2024/11sync-shutdown/
+        '';
+        "11sync.net".extraConfig = lib.mkForce ''
+          redir https://jakstys.lt/2024/11sync-shutdown/
+        '';
+        "http://admin.11sync.net".extraConfig = ''
+          @denied not remote_ip ${myData.subnets.tailscale.cidr}
+
+          redir / /admin/
+          ${builtins.readFile "${pkgs.e11sync-caddyfile}"}
+        '';
+      };
+    };
+
     nsd = {
       enable = true;
       interfaces = ["0.0.0.0" "::"];